[
https://issues.apache.org/jira/browse/DERBY-5292?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13057866#comment-13057866
]
Knut Anders Hatlen commented on DERBY-5292:
-------------------------------------------
Would an alternative be to remove all the overrides and use the visitor for all
nodes? Since the disablePrivilegeCollection() method is defined in
QueryTreeNode, and ValueNode is a subclass of QueryTreeNode, it feels a bit
inconsistent to require overrides only in the non-ValueNode subclasses.
Removing the overrides and relying on the visitor might reduce this code to
just a single invocation of the visitor (with QueryTreeNode.class as argument
instead of SelectNode.class) in FromBaseTable.bindNonVTITables().
> SQLAuthorisation and views
> --------------------------
>
> Key: DERBY-5292
> URL: https://issues.apache.org/jira/browse/DERBY-5292
> Project: Derby
> Issue Type: Bug
> Components: SQL
> Affects Versions: 10.7.1.1
> Environment: windows xp
> Reporter: Thomas Hill
> Attachments: derby5292a.diff, derby5292b.diff, derby5292b.stat,
> output.txt, script.txt
>
>
> Hi,
> in some cases there seem to be issues with SQLAuthorisation in conjunction
> with database VIEWS.
> Please see attached files as repro (script.txt has only the SQL I executed,
> output is the output resulting when running the script).
> I would think identical results should be returned in all cases and
> independent on how the view has been defined, but this to my surprise not
> being the case:
> 1) Trying to select from view appl."VW_MyTasks" - which is a simple view
> defined on just one table - leads to expected results, i.e. "my" tasks are
> being returned.
> 2) Trying to select from view appl."VW_MyPriorityTasks - which is a view
> defined on two joined tables without using an inner join clause - leads to
> expected results, i.e. "my" priority tasks are being returned.
> 3) Trying to select from view appl."VW2_MyPriorityTasks - which is the same
> view but now the two tables joined using an inner join clause - leads to an
> error and no tasks returned (when the same results as in 2) above were
> expected).
> 4) Trying to select from view appl."VW3_MyPriorityTasks" - which is a view
> defined using a subselect - also unexpectedly leads to an error.
> Note: While I could rewrite each inner join clause with changing the syntax
> like in 2) above, this provides a simple work-around for such cases. May be
> there is a work-around for subselects also (not sure if every subselect could
> be rewritten to a join?). However when depending on using EXISTS constructs
> in the query there unfortunately is no way (I would know of) to get around
> this problem. Unfortuanetly a view that makes use of EXISTS is also one I
> would need to define in my data base...
> Thanks
--
This message is automatically generated by JIRA.
For more information on JIRA, see: http://www.atlassian.com/software/jira
